Head-gate.



F. P. SNOW.

HEAD GATE.

APPLIGATION FILED JULY s. 1910.

989,202. Patented Apr. 11,1911.

...Hummm 2: t T:Im. Invertia?? UNITED STATES PATENT OFFICE.

FRANK P. SNOW, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO KELLAR-'.IHOMASONv MANUFACTURING COMPANY, F COVINA, CALIFORNIA, A CORPORATION OF CALI- FORNIA.1

HEAD-GATE.

Specification of Letters Patent.

Patented Apr. 11, 1911.

To all 'whom it may concern.:

Be it known that I, FRANK P. SNOW, a citizen of the United States, residing at Los Angeles, county of Los Angeles, State of California, have invented certain new and useful Improvements in Head- Gates, of which the following is a specification.

This invention relates to head gates or valves such as used in irrigation.

The object of the invention is to produce z a device of` this class having improved means for controlling the valve disk or gate. The

device is constructed in such a way that the simple rotation of a hand wheel will unseat the valve disk and Withdraw the disk laterally to give a complete opening for the water.

In the drawing `forming a part of the annexed specification, Figure 1 is a rear elevation of` a head gate, certain parts being broken away and shown in cross section.

f Fig. 2 is a longitudinal vertical section ythrough the device, certain parts being broken away. Fig. 3 is a bottom plan of the head gate, certain parts being broken away and shown in section.

Referring more particularly to the parts 4 represents the frame of the head gate which comprises two oppositely disposed guide bars 5 which are in the form of vertical channels, and the lower portions of these guide bars are connected by means of a frame plate 6 having a circular opening 7 through which the water passes, the edge of said opening being formed with an undercut groove 8 to receive the packing ring 9. The frame plate 6 is formed with vertical side bars 10 which are disposed adjacentto the guide bars 5 and on their inner edges these side bars 10 are provided at 0ppositely disposed points with notches or pockets 11 for a purpose which will appear more fully hereinafter. These notches 0r pockets are of rectangular form and the lower edge of each pocket is extended by means of a projecting lug 12 as shown most clearly in Figs. 2 and 3.

On the flanges 13 of the guides 5 shoes 14C are mounted to slide and in these shoes 14 a rock shaft 15 is rotatably mounted, the ends of the rock shaft being formed with reduced necks 16 for this purpose as shown in Fig. 3. This rock shaft extends transversely across the opening 7 when the valve is in its closed position and near the central vertical axis of the valve the rock shaft is provided with a short bracket arm 17, the body of which is of cylindrical form extending longitudinally with the rock shaft and from the end of the bracket arm 17 lugs 18 are provided which are rigidly secured to the rock shaft by set screws 19 as indicated. Through the body of the bracket arm 17 a pin 20 extends and the ends of this pin project from the bracket arm and are rotatably secured to the rear side of the disk 21 of the valve by means of bearings 22. The disk 21 is of slightly dished form and provided with packing ring 23 on its inner face which seats against the packing ring 9 as will be readily understood. On its vertical axis the disk 21 is provided with lugs 24 and these lugs are provided with bushings 25 which receive the lower end of an adjusting screw or stem 26 the upper portion of which is provided with screw threads 27. The lower end of this adjusting screw is adapted to slide longitudinally in the lugs 24 as will appear more clearly hereinafter.

The aforesaid bracket arm 17 is provided with ears 28 which project toward the disk and are arranged so as to straddle the adjusting screw 26 as indicated. These ears 28 are formed with longitudinally disposed slots 29 and these slots are engaged by the ends of a cross pin 30 which is mounted in the lower end of the adjusting screw 26 as shown.

The upper ends of the guide bars 5 are connected by a cross har 31 and near its middle point this cross bar is formed with an opening 32 through which the adjusting screw 26 passes upwardly. Above the cross bar 31 a hand wheel 33 is provided with a rigid threaded sleeve 34 which operates like a nut on the thread 27. The lower end of this sleeve is enlarged to forni a head 35 which is retained against the up er side of the bar 31 by a suitable fixed col ar 36.

On the sides of the disk 21 and at oppositely disposed points rectangular dogs 37 are provided and these dogs are adapted to engage the lug 12 when the valve dlsk 21 slides down into position opposite its seat.

The operation of the gate will now be dcscribed.

Supposing that the gate is closed and the disk 21 is seated upon the packing ring 9, by rotation of the hand wheel 33 in the proper direction the adjusting screw 26 will be pulled upwardly. This produces an upward sliding movement of the stem or adjusting screw so that it slides in the lugs 24k and by this movement the pin coperating with the slots 29 will rock the rock shaft 15. By rockingthe rock shaft in this manner the pin. 2O will pull the disk 21 backwardly and unseat it. This backward movement continues until the dogs 37 .withdraw completely 'from the sockets 11 which normally receive them, and the disk can not withdraw laterally until they disengage. As soon as the dogs become clear of the sockets the continued rotation of the hand wheel will draw the stem or adjusting screw upwardly and withdraw the disk 21 from the opening 7 so as to give a complete opening of the gat-e or valve. Reversing this y operation will bring the disk onto its seat.

In ,this connection it should be understood that as the disk moves downwardly when it comes opposite to the opening 7 the dogs 3'? will be arrested by the lugs 1 2 and the fur- -ther downward movement of the disk 21 Awill be prevented. A continued rotation of the hand wheel will produce a downward sliding 'movement of the adjusting screw or stem and this will rock the rock shaft 1 5 so that the bracket arm 17 will rock inwardly 'and force the valve disk over upon its seat.

With the unseating movement of the disk 21 it should be understood that the lower end of the adjusting screw or valve stem 26 v must be sprung slightly in an outward direction, but this mode of operation has no tendency to interfere with the proper seating of the disk for the reason that the lugs 24 are alined with the nut 34C when the disk A is in its seated position. Of course it is unf necessary that the unseated valve disk be nicely alined and it is immaterial whether' it be held exactly in a vertical position or not.

The guide bars are provided at opposite points with lugs 38 by means of which the frame may be secured to the wall of the flume,

What I claim is :-k

1, In a device of the classr described, a

frame having a seat, a disk adapted toA come against said seat, a stem carrying said disk and having a limited sliding movement on said disk, means for raising and lowering` said stem to withdraw said disk from said seat, means for arresting the movement of said disk adjacent to said seat, and means esaaoa' for moving said disk upon said seat when arrested.

2. In a device of the class described, a

frame, a transversely disposed rock shaft, a disk connected with said rock shaft, said frame having a seat for said disk, said rock shaft affording means for advancing said disk to said seat, a stem connected with said disk, means for raising and lowering said stem to withdraw or advance said disk, and

-means for arresting the movement of said disk adjacent to said seat.

3. A device of the class described coinprising a frame having a valve seat, a transverse rock shaft, means for guiding said rock shaft on said frame, a disk connected with said rock shaft and adapted to be brought upon said seat by a rocking movement of said rock shaft, a ystem mounted to slide in said disk, means for arresting the movement of said disk when opposite said seatand means for raising it on said stem.

ll, A device of the class described, com-V prising a frame having a valve seat, aro'ck shaft, means for guiding said rockshaft onr said frame, a bracket arm secured to said rock shaft, a disk connected vpivotally with said bracket arm and adapted to move upon j said seat when said rock shaft rotates, a

valve stem, means for guiding said valve stem to slide on said disk, means connecting said valve stem with said bracket arm for i rotating said rock shaft, means for arresting the movement of said disk adjacent to said seat and means for raising and lowering said stem.

5. A device of the class described comprising a frame having a valve seat, a transversely disposed rock shaft, means for guiding said rock shaft on said frame, a bracket arm secured to said rock shaft, a disk, means for pivotally connecting said disk'with said bracket arm, a stem mounted to slide on said disk, a pin and slot connection between said stem and said bracket arm for rocking said p rock shaft, means for raising and lowering said stem and means for arresting said disk adjacent to said seat. p

In witness that I claim the foregoing I have hereunto subscribed my name this 2%th day of June, `1910.

" FRANK r. snow.

Witnesses: i

F. D. AMMEN, y EDMUND A. STRAUSE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, I). C.l 

